<p>
  <!-- <app-header></app-header> -->
  <a [routerLink]="['/admin/home']">home</a>
  <a [routerLink]="['/admin/form']">form</a>
  <a [routerLink]="['/admin/pipe']">pipe</a>
  <router-outlet></router-outlet>
  <!-- <app-footer></app-footer> -->
</p>
